The Brooklyn DA laid down the law to warring Hasidic factions yesterday, vowing that more arrests would follow this week’s bust of several men charged with beating up a rival inside a Williamsburg synagogue.

“It has to be made clear to the leadership of both sides that if you come to commit crime in the county, you will be arrested,” District Attorney Charles Hynes said regarding the bitter succession battle for leadership of the Satmar Hasidic sect.

Two brothers, Aaron and Zalman Teitelbaum, are vying to succeed their late grand rabbi father, who died last week.

The split between partisans has even exploded into fistfights like the one that broke out in a synagogue on April 22 when, Aaron supporter Abe Rubin claims, three Zalman followers at the congregation Yetev Lev jumped him, broke his finger and stole his fur hat.

“I went in to pray,” Rubin told The Post. “I went into the synagogue and it didn’t take five minutes and I was beaten.”